The Nyainqentanghla Shan: Testing Models of Tibetan Crustal Evolution in an Oblique Crustal Section

试图解释印亚碰撞带演化的定量构造模型，对喜马拉雅和西藏地壳内部的热物理状态做出了可检验的预测。然而，很难获得合适的样品来测试这些模型，因为西藏大部分地区几乎没有经历过第三纪剥蚀，从而限制了浅层的暴露水平。本项目旨在利用大型南北向地堑带出地表的中地壳岩石，获得所需的样品来检验模型。研究结果应提供地堑形成的拆顶模式和其他机制，并对新近纪中地壳发育的几种模式进行评估。

9909551HarrisonQuantitative tectonic models seeking to explain the evolution of the Indo-Asian collision zone make testable predictions regarding the thermal and physical state of the interior Himalayan and Tibetan crust. However it is difficult to obtain suitable samples to test these models because most of Tibet has experienced little Tertiary denudation, thus limiting the level of exposure to shallow depths. This project is aimed at obtaining the required samples to test the models by using exposures of middle crustal rocks brought to the surface by a large north - south trending graben. Results should provide the pattern of unroofing and other mechanisms of graben formation as well as allowing assessment of several models of mid-crustal development during the Neogene.